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atos先導(dǎo)型溢流閥的導(dǎo)閥部分是一個(gè)易振部位.在高壓情況下溢流時(shí),導(dǎo)閥的軸向開口很小,僅0.003~0.006厘米。過(guò)流面積很小,流速很高,可達(dá)200米/秒,易引起壓力分布不均勻,使錐閥徑向力不平衡而產(chǎn)生振動(dòng)。另外錐閥和錐閥座加工時(shí)產(chǎn)生的橢圓度、導(dǎo)閥口的臟物粘住及調(diào)壓彈簧變形等,也會(huì)引起錐閥的振動(dòng)。所以一般認(rèn)為導(dǎo)閥是發(fā)生噪聲的振源部位。
atos先導(dǎo)式溢流閥在卸荷時(shí),會(huì)因液壓回路的壓力急驟下降而發(fā)生壓力沖擊噪聲。愈是高壓大容量的工作條件,這種沖擊噪聲愈大,這是由于溢流閥的卸荷時(shí)間很短而產(chǎn)生液壓沖擊所致在卸荷時(shí),由于油流速急劇變化,引起壓力突變,造成壓力波的沖擊。壓力波是一個(gè)小的沖擊波,本身產(chǎn)生的噪聲很小,但隨油液傳到系統(tǒng)中,如果同任何一個(gè)機(jī)械零件發(fā)生共振,就可能加大振動(dòng)和增強(qiáng)噪聲。所以在發(fā)生液壓沖擊噪聲時(shí),一般多伴有系統(tǒng)振動(dòng)。
atos先導(dǎo)型溢流閥發(fā)出的噪聲中,有時(shí)會(huì)有機(jī)械性的高頻振動(dòng)聲,一般稱它為自激振動(dòng)聲。這是主閥和導(dǎo)閥因高頻振動(dòng)而發(fā)生的聲音。它的發(fā)生率與回油管道的配置、流量、壓力、油溫(粘度)等因素有關(guān)。一般情況下,管道口徑小、流量少、壓力高、油液粘度低,自激振動(dòng)發(fā)生率就高。
常用型號(hào)
RZMA-A-010/250/M;RZMA-A-030/180/M/7;RZMO-A-010/100;RZMO-A-010/210;RZMO-A-010/315;RZMO-A-010/315/18;RZMO-A-010/50;RZMO-A-010/50/18;RZMO-A-030/100;RZMO-A-030/210;RZMO-A-030/210/18;RZMO-A-030/315;RZMO-AE-010/315;RZMO-AE-030/100;RZMO-P1-010/100/18/MC;RZMO-P1-010/210;RZMO-P3-010/100/AM1NSA;RZMO-P3-010/100/I/AM1NSA;RZMO-P3-010/210/I;RZMO-P3-010/210/I;RZMO-TER-010/100;RZMO-TER-010/315;RZMO-TER-010/315/I;RZMO-TER-030/210;RZMO-TER-030/315/I
AGMZA-A-10/250/M;AGMZA-A-10/250/PA-M;AGMZA-A-10/80/PA-GK;AGMZA-A-10/80/PA-GK/24;AGMZA-A-20/250/M;AGMZO-A-10/100;AGMZO-A-10/100/Y;AGMZO-A-10/210;AGMZO-A-10/210/18;AGMZO-A-10/210/E;AGMZO-A-10/210/Y;AGMZO-A-10/315;AGMZO-A-10/315/E;AGMZO-A-10/315/Y;AGMZO-A-20/210;AGMZO-A-20/315;AGMZO-A-20/315/Y;AGMZO-A-32/315;AGMZO-AE-10/210;AGMZO-AE-10/315 10;AGMZO-AE-20/315/Y;AGMZO-AE-32/315;AGMZO-TER-010/210/I;AGMZO-TER-10/100/I;AGMZO-TER-10/210;AGMZO-TER-10/315/Y;AGMZO-TER-20/210;AGMZO-TER-20/315/Y
AGMZO-TER-10/210/EI;AGMZO-TER-10/210/I;AGMZO-TER-10/315;AGMZO-TER-10/315/I;
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